基于数字相位控制的低太赫兹频段功率合成

发布时间：2018-03-07 20:16

本文选题：太赫兹　切入点：功率合成　出处：《浙江大学》2015年硕士论文　论文类型：学位论文

【摘要】：太赫兹是微波领域的前沿研究学科。在众多的太赫兹波技术难题中,如何得到高功率的太赫兹辐射源一直是太赫兹技术发展的一大阻碍。近年来,这一问题的研究已经受到了越来越多的关注重视,其中功率合成是解决该问题的一种非常有效的方法。本论文提出了一种基于数字相位控制在低频率太赫兹波的功率合成的方法,这种方法可以解决功率合成当中相位校准的问题。经过理论上的分析,该方法可以提高最终功率合成的效率。为了证明我们的这种方案的可行性,我们使用渡越时间雪崩二极管设计完成了在0.11THz的原理样机。雪崩二极管只有装备在合适的腔体中才能保持最佳工作状态。我们通过仿真设计以及实际测量完成了雪崩二极管的腔体以及阻抗匹配的设计,使腔体能够同时满足对射频激励源输入和低频率太赫兹输出上的匹配。雪崩二极管需要配置一定的激励源才能倍频到目标频率。本文按照激励源的具体要求,从原理分析、设计方案到围绕具体芯片搭建电路对雪崩二极管的射频激励源和直流偏置进行了详细的说明,针对激励源的各项指标对装配完成的电路进行了测试。本文对0.11THz的原理样机进行了测量并对结果作进一步分析。测量的结果符合预期的分析。分析显示,本文提供的方法能够应用在低频率太赫兹波段的功率合成上,并提供足够的相位控制精度。
[Abstract]:Terahertz is a frontier research subject in the field of microwave. Among the numerous technical problems of terahertz wave, how to obtain high power terahertz radiation source has been a big obstacle to the development of terahertz technology. More and more attention has been paid to this problem, and power synthesis is a very effective method to solve the problem. In this paper, a power combination method based on digital phase control in low frequency terahertz wave is proposed. This method can solve the problem of phase calibration in power synthesis. This method can improve the efficiency of the final power synthesizer. In order to prove the feasibility of our scheme, we designed a prototype at 0.11THz using a transition time avalanche diode. Avalanche diodes can work best only when equipped in a suitable cavity. We have designed the cavity and impedance matching of the avalanche diode by simulation design and actual measurement. The cavity can satisfy the matching of RF excitation source input and low frequency terahertz output simultaneously. Avalanche diodes need to be equipped with a certain excitation source to double the frequency to the target frequency. In the design scheme, the RF excitation source and DC bias of avalanche diode are explained in detail around the circuit built around the specific chip, and the circuit completed by assembly is tested according to the parameters of the excitation source. In this paper, the principle prototype of 0.11THz is measured and the results are further analyzed. The results are in line with the expected analysis. The analysis shows that the method provided in this paper can be applied to the low frequency terahertz band power synthesis. And provide enough phase control accuracy.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN73

【参考文献】